Automatic dumping truck



March 19, 1929. EISENHUT 1,705,968

AUTOMATIC DUMP ING TRUCK Filed Feb. 1925v 2 Sheets-6mm 1 zwwzgawaz March 19, 1929. E. EISENHUT 1,705,968

AUTOMATIC DUMPING TRUCK Filed Feb. 5, 1925 2 Sheets-Sheet ltatented Mar. .19, 192 9.

- nnnns'r nrsnnnnn; or GALION, OHIO, assrenon, BY Mnsnn ASSIGNMENTS, 'roenn- Tn-AL onIo s'rnnn rnonncrrs COMPANY, or elation", 01110, A GORPORATIONVOF V OHIO.

AUTOMATIC nnivirme TRUCK.

Application filed February 2, 1925. serial No. (5,608.

This invention relates to dumping trucks,-

and particularly to those dumping. wagons where the body is mounted for rocking movement upon the frame or chassisot the truck, the body being tilted by positiveinanually operable means and brought toits horizontal position after discharging its-load by a positive manually operable means. T

One of the objects of the present invention is to provide manually operablemeans for positively tilting the'body from its horizon tal position to its discharge. position, which will include means absorbing the shock of the chassis caused by the arrest of the dumping action.

A further object is to provide means not only acting to shift theb ody to its dumping "position-but acting to hold and lock the body at the maximum dumping angle until released. i r

A still further object is to provide manually operable means for tilting the body which I will furnish the initial movement to cause the return of the body to itsroad'or horizontalposition, and further in this connection to automatically lock thebody in its horizontalor road position on its return.

Another object'is to provide means for releasing and giving an initial impulse to the body toward its horizontal or road position and releasing the body to permit it to oscillate to its tilted position, which is operated.

by a lever disposed adjacent the drivers seat and which maybe operated without the driver turning around, which operating leverinay also be pulled to cause the return of the body to its horizontal or road position. 7 Still another objectis to provide a body which is automatically lockedlin its road. po- 'sition without reliance on pins, plugs or springs,.and in general to provide a fully automatic gravity dumping body having the "features heretofore set forth.

Other objects willappear in the course of the following description.

My invention is illustrated in the accom panying drawings, wherein Figure 1 is a fragmentary side elevation of a dumping truck showing my mechanism applied thereto, the body being lowered;

' Figure 2'is alike view to Figure 1 but with the body raised 7P ATEN OFFICE.

Figure 3 is an enlarged elevation of the prop and the actuating means therefor with" 'th ebody lowered; r

igure 4- is a top planview of a portion of the iron l l'and the body operating means attachedthereto; a

Figure 5 is a like view :to Figure 3 but showing the prop: extended;

operating-lever the prop and shaft therefor;" 1

Referring to these drawings, it will be seen F igure-6 is airagmentary elevation of the 3 5 latch showing ts engagement w th the bolt that I have illustrated such portions o1 :a

dumping truck as are necessary for a :clear idea of-the construction andyoperation ofmy invention, and that in these drawings 10 designates thelongitudinal beams of the chassis, thesebeams being preferably channel iron. Mounted uponv the beamsat their rear ends or supported in. any suitable manner is an ap-. proximately U-shaped angle ironll, and at the: rear ends of thearms of'the U-shaped angle iron there are-parallel 'shortirons 12 and a plurality as,'tor instance,three transverse pins 13. The dumping body 14: is pro videdlwith a pair of sector-shaped members.v

between'the pins 13, and these sector-shaped members and the teeth constitute a fulcrum upon which the dumping'body tilts. I do notwish to be limited to this, however, as any other means for pivotally or tiltingly supporting the dumping body 14 may be provided.

The forward end of the body 14 is pro- I u o 15 having teeth which mesh with the spaces 7 keeper 18 and a rectangular head 26 having a surface disposed at an angle of approxitil mately 4 to the horizontal plane, this surface extending upward and forward.

Mounted upon the forward end of the truck body behind the counterbalance 16 is a tubu lar casing 2'? which is pivoted at 28 between cars 29 and which is open at its lower end, and operating through this casing is a rod 30 carrying a collar 31 at its inner end which operates against a coiled compression spring 32 disposed within the casing, this spring hearing at its lower edge against a flange 33 immediately surrounding the connecting rod or link 30. This link or connectingrod 30 at itsend remote from the body is pivotally connected at 31 to an arm 34 which is loosely mounted upon the shaft 19 for independent oscillation. Thisarm at its end adjacent the rod 30 is angularly off-set, as at 35, and bifurcated to receive the extremity of the rod 30. Theextremity of the rod 30 is rounded and formed at one point with a notch 36, and mounted. upon the upper face of the arm 34 is a locking rod 37 whose extremity is adapted to engage in the notch 36 and which is urged in this direction by a spring 38, this red being mounted in guides 39 and being actuated by means of a link lO which is pivoted thereto and whose other end is pivoted to an angular or hell crank lever 41 mounted upon the arm 3 1 and specifically between the two sections of this arm, this arm being formed in two parallel sections held to each other by bolts 12 and held apart by spacing sleeves or like means.

The flat bars or sections which constitute this arm 34 at their forward ends are spread apart to embrace and be disposed on each side of that portion of the latch 24 which is mounted upon the shaft 19, as illustrated in Figure 7. Surrounding the shaft 19 is a coiled spring 13, which at one end is attached .to this shaft and at the other bears against a transversely disposed angle iron 44 having stop 45. The spring, therefore, urge. the shaft in a counterclockwise direction.

' It will be obvious new that when the shaft 19 is turned seas to bring the arm 34 and the link 30 into line, as illustrated in Figure 2, that the latch bolt 37 will slip into the notch 36 and thus lock the two sections of the prop in approximate alignment with each other and with the body tilted, and under these circumstances it is impossible for the prop formed of the two sections to break but that when the locking bolt is retracted the two sections of the prop may break and fold upon each other to permit the body to return to its initial position.

The operation of this mechanism is as follows: Assuming that the body is turned into a horizontalposition, as shown in Figure 1, then a pull on the hand lever 22 by the truck operator operates through connecting rod 21 to impart an. oscillatory ement to the shaft 19. This causes the latch 24 to move rearward, withdrawing it from engagement with the keeper 18. As soon as the latch is withdrawn from the keeper 18, force of'gravity causes the body to tilt upon its fulcrum and the load to be discharged. As the body tilts from the horizontal. to its dumping position, it causes the sections 30 and 34-, which really constitute two links, to straighten out from an angular position with relation to each other into or toward a straight line position, and when the body reaches its predetermined maximum dum aingangle the pivotal. points 19, 31 and 23 are approxi nately in the same line and the two sectionsor links are approximently in line, wi h each other. Therefore, the further movement of the tilting body is arrested. Inasmuch as the dumping body is connected to the link or rod 30 by the spring housing 27 and the spring therein, it follows that the. shock caused bythe sudden cessation of the dumping movement is transmitted through the spring housing to the spring 32 which is, therefore, compressed so that the shock is expended against this spring. v

As the body comes to rest at the maximum dumping angle, the latch bolt 3'] is forced by the spring 38 into the notch 36, preventing further rotation of the parts around the pivot 31. The two portions of the prop formed by these two sections 30 and 34: are thus locked in approximately the same line, preventing any further movement of the body.

If now it be desiredto returnthe body to its normal position, then a pull is exerted on the hand lever 22. This operates througl'i the connecting rod 21 to impartan oscillatory movement to the arm 20 which is transmitted through the shaft 19 to the main latch 24:, causing this latch to move rearward. As it moves rearward,-the head 26 of this latch will strike the bell crank lever l1 and turn this bell crank lever on its pivot, thus causing the withdrawal of the bolt 37 from the notch 36. This movement continues until the inclined outer face of this latch Q l comes in contact with both arms of the bell. crank lever 41, as shown in Figure 6, which locks this bell crank lever so it can no longer move and at the same time locking the arm at to the main latch so that as the main latch moves downward and rearward, a downward and rearward movement of the lower section 3a or lit) arm will be produced and a positive mechanical action willbe thus caused tending to give 4 an initial return impulse to the body to cause it to return to its road'or horizontal position. This movement of the hand lever has been secured against the action of the spring 43 and, therefore, as soon as the hand lever is released thesprin'g 43 operating throughthe shaft19 Will bring the arm 20 backagainst the stop 45, preventing the travel of the main latch 26 beyond its proper location for engagement with the latch hook or keeper 18. As the. body return'sto itsroad position through the gravity action of the counterbalancing apron 16, the beveledsurface on the lower face of thelatch'hook comes in contact with theinclined surface of the upper side of the main latch or keeper 18, forcing the main latch backward until the locking surfaces are in alignment. Thenthe spring 43 operating through the shaft 19 forces the main latch into complete engage ment with the keeper, securely locking the body in road position.

v 4 It is to be noted at this point'tliat the fulcruin for the body is'a shifting fulcrum, that h when the body is in a horizontal position the supporting point or fulcrum is'nearest to the forwardend of thebody and,itherefore, the

rear end of the body is the heaviest so that the counterbalancing.action is such as to urgethe body to a tilted position. .:As the body tilts or moves toward its fully upright position, the fulcrum shifts rearward until when the body isfully tilted the fulcrum is nearer to the rear end of thebody than it isto the forward end but the body is held in its tilted position ,at this time by the prop composed of the two. sec

tions 30 and 34. Therefore, when these two sections areiinlatched there is a tendency, on

the part of the body to return to its horizontal position, and when the lever 22 is pulled quickly back it acts to throw the latch24 rearward, release the locking bolt 87 and almost in stantly bring the bell crank of the locking bolt to the position shown in Figure 6 and give a slight downward an'd rearward move mentto the section 34. As soon as this'slight ,downward moveinent is given the hand lever is released and the'latch24 returns under the action of the spring to its initial position, but the impetus given to the link or section 34 is sufiicient to transmit impetus to the dumping body to cause it to move downwardrapidly, which movement is accelerated by the counterbalance on the forward end of the body. As the body shifts to its horizontal position, the fulcrum shifts forward also, as heretofore explained. Thus it will be seen that while this mechanism might be applied to a truck having .a tilting shiftable fulcrum, yet there is an intimate coaction between the shifting fulcrum and the prop, with the actuatingmeans therefor,

in that when the body is in its horizontal popivoted to each other body not mounted upon a sition gravity urges the bodyto-a tilting position, and when the body isin its tIltGClpOSh sition. I I

It will be seen that the principal feature of the entire mechanism is that it providesin a unitary device means for holding the dumping body locked in its raisedposition, means for releasing the locking means for holding the body at a dumping angle, and means for returning and locking the body in its road position whilethe operator at all times maintains his correct driving position. This mechanism is such that it does not make it necessary for the operator to turn around, reach in back of his seat, or dismount entirely in order to release the lock, and furtlierinorein iny mechanism the dumping body is automatically and securely lo'cked'at the dumping angle until the operator himself causes its re:

vtion gravity urges it backto a horizontal p0- lease. Furthermore, with this mechanism the nitial impulse to return movement is automatically and mechanically given and the mechanismhas a self-contained shock absorber and-holds the lock in proper position for engagement on the return and at alltimes the part of the operator. Furthermore, with this mechanism the operator isrequired not topush upon this handle but to pull upon the handle and the'pull upon the handle when the 'when not released by apositive movement on} body is in its road position causes the release I ofthe body in its dumping positionand a like pull upon the operating handlewheri the" body is in a tilted posit-ion will'caus'ethebod'y toreturn to its horizontalp'osition. Y

. It'will be seen that this mechanism hasn'o they cannot be removed, has -no exposed springs, and no delicate trip devices. It will pins or plugs to become worn or rusted so thatbe further seen that the starting movement j for dumpingthe body is given by the release ofthe lock bythe operation of the hand lever, which, when the body is in dumping position,

' by the same operation gives movem'ci'it,'suiii'- tilted including a prop formed in two sections ends, the sections beingrespectively pivoted to the body and to the chassis, one of said sections including a barrel, and a plunger oper ating' within the barrel, and aspring contained within the barrel and against which the plunger operates as the two sections of the attheir approximate prop move into approximately aligned position and the body nears its fully tilted position.

2. In a vehicle, a chassis, a tiltable body thereon, means for holding; the body tilted and limiting its tilting movement including a prop formed two sections pivoted to each other at their proximate ends, the sections being pivoted to the body and to the chassis, releasable means normaly holdi 3; the body lowered and the prop itolded, a lock carried by one oi the sections and adapted to lock the sections in appro iuiate alignncnt when the body is iullytil and a single manually operable means 0pc i-iivcly' connected to said holding means to cause the release thereof when the manually operable means is actuated to thereby permit the body to sh to a tilted position, said releasable molding; means adapted to operatively 'eng' "re said lock to rel ase the same when the body .n its tilted position and to give an initial n'npulse of retraction to the sections of the prop.

3. In a vehicle, a body mounted upon a fulcrum and tending when in a horizontal 'iosition to move to a tilted posit on and when a tilted position tcndin to retin'n. to its horizontal position, mean a ti ,J to support the body in a tilted position, singiglc means adapted to automatically on o the body when the body has approximzuely reached its horizontal pos't on to hold the body in said horizontal on and it the body he in a tilted position acting when shifted in one direction to release said supporting means and give an initial return. impulse to the body, and manually operable means for shittjug" said single means in a direction to give said initialreturn impulse.

l. In a vehicle, a chassis, a body swingingly mounted thereon for movement from a horizon l to a tilted position, a prop formed in two sections pivoted to each. other and respcctively pivoted to the chassis and to the bodyandwhen shifted into angular relation to swing into a convergent position toward the rear end of the body, a spring actuated latch adapted to enga go the body as it moves from a tilted to a horizontal position and hold the body in. a horizontal position, and manually actuatable means operatively connected to said latch to shift the latch from its enr a 'inp; position and permit the tilting of the body, said latch. operatively engaging one section o1 said prop to cause the sections to move lil'Olll aligned position to thereby permit the body to move downward and thereby give an additional return impulse to the body.

5. In a vehicle, a chassis, a body mounted thereon for tilting movement and tending, when in a horizontal position, tomove to a tilted position and when in a tilted position tending to return to ahorizontal position, a latch pivotally mounted upon the chassis, a

keeper mounted upon the body and with which the latch is adapted to automatically engage when the body has reached its horizontal position, means for holding the body in a tilted position including sections pivoted to each other and respectively pivoted to the chassis and to the body and when thebody is tilted being disposed in line with each other and limiting the tilting movement of the body, means locking the sections in approximate line with each other, manually operable means for shifting said latch rearward to permit theniovement oi' the body into a tilted position to discharge its lead, and means actuated by a further movement of the latch under the action ot' said actuating; means acting to unlock said sections and positively shift the sections out oft approximate alignment with each other to thereby give an initial return impulse to the body and permit the downward movement of the body.

P i i 1 1 o. ZL VGlHClG, a chassis, a body mountec upon the chassis for tilting movement from a horizontal to an inclined discharge position, a latch mounted on the chassis/and adapter to automatlcally engage the body engage one section oi the prop to thereby shirt the sections rearward out of alignment with each other and permit the sections to lold as the body descends to a horizontal position.

7. In a vehicle, a chassis, a body mounted upon the chassis for tilting movement froma horizontal to an inclined discharge position, a latch mounted on the chassis and adapted to automatically engage the body as the body nears its horizontal position and lock the body in this horizontal position, a prop formed in two sections pivoted to each other,the' sections being respectively pivoted to the chassis and to the body and adapted, when in line with each other, to hold the body in its inclined position against downward movement, and a manually actuatable controllingmember movable in one direction to first-release the latch and upon'a further movement to cause the latch to operatively engage one section of the prop to thereby shift the sections rearward out of alignment with each other and permit the sections to told as thebody lilO ' tion and vice versa, a latch-member swing- 8. In a vehicle, a chassis, a body pivotally mounted upon the chassis for movement from a horizontal position into an inclined'posiingly mounted upon the chassis, a-keeper, on the body with which the latch member is adapted to engage, a spring urging the latch member into a position where it will engage the keeper, a manually actuatable member operativelyconnected to the latch member to shift it rearward and out of its locking p0sition, a prop formed in two sections pivotally connected to each other and respectively pivoted to the chassis and to the body, a spring actuated locking bolt carried by one of saidsections and adapted to engage with the other sectionto thereby lock the two sections in approximate aligned position, a lever connected to the locking bolt andshiftable in one direction to release it, said lever being disposed in the path of movement of the latch when the body is in a tilted positionand the latch is moved rearward, the latch becoming operatively engaged with the section when the bolt has been retracted to there by shift the section rearward to thus cause the prop to break and to transmit an initial downward impulse to the body, and a spring returning the latch to its initial position.

9. In a vehicle, a chassis, a tiltable body thereon, means for holding the body tilted and limiting its tilting movement including a prop formed in two sections pivoted to each other, the sections being respectively pivoted to the body and to the chassis, a bolt carried by the lowermost section and adapted to 'engage the uppermost section when the sections are in approximate alignment with each other and the body is tilted to thereby hold the prop from breaking, the bolt having an angular latch intothe path of movement of the keeper,

the head of the latch, when the latch is shifted rearward and the two sections of the prop are in approximatealignment with each 7 other, engaging the lever, connected to the bolt and shifting the lever to withdraw the bolt and then engaging the lever to cause a unitary movement ofthe lower section and of the head of the latch rearward to thereby break theprop and give an initial downward impulse to the body, said spring acting to return the latch to its normal position as soon as the actuating member is released.

10. In a vehicle, a body mounted upon a fulcrum and tending when in a horizontal position to move to a tilted positlon and when in a tilted position tending to return to its I horizontal position, means acting to support the body in a tilted position including a prop formed in two sections pivoted to each other at their meeting ends, one of said sections being pivoted to the body and the other to the chassis of the truck, a lock carried by one section and automatically engaging the other section when the two sections of the prop arein aligned position and the body is tilted, and manually operable means shiftable in one direction to engage said lock and retract it and give an initial return impulse to the body.

I In testimony whereof I aliix my signature.-

' ERNEST EISENHUT. 

